Specifications

36 SAM0023-122898 ESS Technology, Inc.
ES1869 DATA SHEET
PNP CONFIGURATION AND REGISTERS
Returns 4 (no DMA channel selected).
Bit Definitions:
LDN 5: Modem Device
The Modem Device is optional. If present, it is LDN 3, 4, or 5.
Activate (30h, R/W)
After reset or after a 1 is written to the reset bit in the card’s
configuration control bit, the default for this register is 0.
Bit Definitions:
I/O Range Check (31h, R)
This register verifies that the I/O range assigned to a
logical device does not conflict with the I/O range used by
another device.
Bit Definitions:
I/O Decoder 0 Base Address (60h, R/W)
I/O base address of address range, bits 11:8.
Eight locations.
I/O Decoder 0 Base Address (61h, R/W)
I/O base address of address range, bits 7:0.
Interrupt Request Modem Select (70h, R/W)
Interrupt request modem select.
Bit Definitions:
Interrupt Request Type Select 0 (71h, R)
Interrupt request type select 0. Returns 2 (low-to-high
transition).
DMA Channel Select for Modem (74h, R)
Returns 4 (no DMA channel selected).
Bit Definitions:
LDN 6: General-Purpose Device
The general-purpose I/O device is optional. If present, it is
LDN 3, 4, 5, or 6.
Activate (30h, R/W)
After reset or after a 1 is written to the reset bit in the card’s
configuration control bit, the default for this register is 0.
Bit Definitions:
I/O Range Check (31h, R)
This register verifies that the I/O range assigned to a
logical device does not conflict with the I/O range used by
another device.
7 6 5 4 3 2 1 0
Bits Name Description
2:0 Data Select which DMA channel is in use for CD-ROM
DRQ.
0 0 0 0 0 0 0 Activate
7 6 5 4 3 2 1 0
Bits Name Description
0 Activate 1 = Activate.
0 = Deactivate (default).
0 0 0 0 0 0 Enable range check Pattern select
7 6 5 4 3 2 1 0
Bits Name Description
1 Enable
range
check
1 = Enable range check.
0 = Disable.
0 Pattern
select
1 = 55h.
0 = AAh.
0 0 0 0 A[11:8]
7 6 5 4 3 2 1 0
A[7:0]
7 6 5 4 3 2 1 0
0 0 0 0 Data
7 6 5 4 3 2 1 0
Bits Name Description
3:0 Data Select which interrupt used for modem IRQ.
0 0 0 0 0 0 1 0
7 6 5 4 3 2 1 0
0 0 0 0 0 Data
7 6 5 4 3 2 1 0
Bits Name Description
2:0 Data Select which DMA channel is in use for Modem
DRQ.
0 0 0 0 0 0 0 Activate
7 6 5 4 3 2 1 0
Bits Name Description
0 Activate 1 = Activate.
0 = Deactivate (default).
0 0 0 0 0 0 Enable range check Pattern select
7 6 5 4 3 2 1 0